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Beefing up SB bottom end
#1090156
10/07/11 10:21 PM
10/07/11 10:21 PM
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Joined: Feb 2009
Posts: 1,532
off the grid
340B5
OP
pro stock
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OP
pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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I'm looking for suggestions on beefing up the bottom end of my SB. It will be 340 main, 3.580 stroke. Should be just under 500 hp.
Just ARP bolts? Stud girdle? Even thought about a partial fill, but I would like to maintain cooling in case I use it for a street motor.
Thoughts appreciated....thanks
Yeah, it's got a smallblock.
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Re: Beefing up SB bottom end
[Re: 340B5]
#1090158
10/07/11 10:33 PM
10/07/11 10:33 PM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Good rod bolts and main studs never hurt but other than that I'd say you're fine.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Beefing up SB bottom end
[Re: Guitar Jones]
#1090159
10/07/11 10:37 PM
10/07/11 10:37 PM
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Joined: Dec 2006
Posts: 3,395
Pa
Hot 340
master
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master
Joined: Dec 2006
Posts: 3,395
Pa
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Quote:
Good rod bolts and main studs never hurt but other than that I'd say you're fine.
As far as rods go I would buy new GOOD ones, thats a given. Wouldnt bother with the stockers.
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Re: Beefing up SB bottom end
[Re: Hot 340]
#1090160
10/07/11 10:54 PM
10/07/11 10:54 PM
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Joined: Feb 2009
Posts: 1,532
off the grid
340B5
OP
pro stock
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OP
pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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Thanks. I'm good on the rod bolts(ARP 2000)they will be streched properly. I think I'll just use some ARP main bolts, they really don't cost that much and the piece of mind is worth it.
Yeah, it's got a smallblock.
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Re: Beefing up SB bottom end
[Re: dartman366]
#1090164
10/08/11 02:15 PM
10/08/11 02:15 PM
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Joined: Feb 2009
Posts: 1,532
off the grid
340B5
OP
pro stock
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OP
pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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If I would use full groove mains and the HN series rod bearings for extra clearance, would it sling too much oil up top for the rings to control? I've had good luck w/ the 1/2 groove mains.
Yeah, it's got a smallblock.
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Re: Beefing up SB bottom end
[Re: 340B5]
#1090165
10/08/11 02:23 PM
10/08/11 02:23 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Wanna play it a little safer, you could consider Billet main caps and studs for the middle 3 - usually the first problem that shows up on a sm blk when making over 500 hp.
Fastest 300
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Re: Beefing up SB bottom end
[Re: justinp61]
#1090167
10/08/11 03:31 PM
10/08/11 03:31 PM
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Joined: Dec 2006
Posts: 3,395
Pa
Hot 340
master
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master
Joined: Dec 2006
Posts: 3,395
Pa
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Quote:
, that doesn't worry though, I know the volume is there.
How do you get more volume to the bearings without increasing the pressure or galley size?
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Re: Beefing up SB bottom end
[Re: justinp61]
#1090168
10/08/11 03:36 PM
10/08/11 03:36 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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I would go with main studs and align hone the mains because the caps can change with studs. As far as bearing I can't see any reason not to just run a standard P bearing set. Drill all the gallerys. If you are only turning 7,000 you may want a high volume depending on your clearances and oiling system. If you are turning higher and have the oil restricted save some power and run a standard pump with a port job. You shouldn't need any hard block. Nothing wrong with a short fill as it will dampen detonation.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: Beefing up SB bottom end
[Re: Hot 340]
#1090169
10/08/11 03:47 PM
10/08/11 03:47 PM
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Joined: Oct 2003
Posts: 11,684
W. Kentucky
justinp61
I Live Here
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I Live Here
Joined: Oct 2003
Posts: 11,684
W. Kentucky
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Quote:
Quote:
, that doesn't worry though, I know the volume is there.
How do you get more volume to the bearings without increasing the pressure or galley size?
I should've been more specific, the oil passages in the block have been enlarged. The pump is a HV.
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Re: Beefing up SB bottom end
[Re: justinp61]
#1090170
10/08/11 03:48 PM
10/08/11 03:48 PM
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Joined: Dec 2006
Posts: 3,395
Pa
Hot 340
master
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master
Joined: Dec 2006
Posts: 3,395
Pa
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Quote:
Quote:
Quote:
, that doesn't worry though, I know the volume is there.
How do you get more volume to the bearings without increasing the pressure or galley size?
I should've been more specific, the oil passages in the block have been enlarged. The pump is a HV.
 Gotcha
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Re: Beefing up SB bottom end
[Re: Leon441]
#1090173
10/08/11 11:03 PM
10/08/11 11:03 PM
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Joined: Jan 2007
Posts: 3,695
nc
emarine01
master
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master
Joined: Jan 2007
Posts: 3,695
nc
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Quote:
I would go with main studs and align hone the mains because the caps can change with studs. As far as bearing I can't see any reason not to just run a standard P bearing set. Drill all the gallerys. If you are only turning 7,000 you may want a high volume depending on your clearances and oiling system. If you are turning higher and have the oil restricted save some power and run a standard pump with a port job. You shouldn't need any hard block. Nothing wrong with a short fill as it will dampen detonation.
Leon
Can you explain the short fill & dampen detonation thing.... 
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Re: Beefing up SB bottom end
[Re: MIKES_DUSTER]
#1090178
10/09/11 09:18 PM
10/09/11 09:18 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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We drove one way more than we should have on the street with a 3/4 fill. Steel TA heads and a 340 block. It was very cool on water temp. But, sit at a few stop lights and you could see the oil pressure getting low at idle. I'm told all you need to do is run an oil cooler and keep going. From my experience I would agree that would probably work fine.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: Beefing up SB bottom end
[Re: MIKES_DUSTER]
#1090179
10/09/11 09:38 PM
10/09/11 09:38 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Can you fill or 1/2 fill your block and still be able to drive on the street without it over heating?? Not talking about driving a 100 miles a day but maybe to the store,church or a local cruise??
I didnt like it... think of a filled block as a
big heat sink... the water doesnt draw off nearly
as much as a standard block because the water isnt
touching that much area... now the oil is what is taking
the heat off... a big oil cooler is a MUST
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